and a small number of pre-configured assemblies for a few commonly available speaker drivers: the Dayton Audio DMA70-4, ND91-4, and the TCP115-4. Not enough for you? Check out [zx82net]’s ...
A Tinyshine Bluetooth audio board is hooked up to a Dayton Audio Class D amplifier ... wanting to build their own high-fidelity Bluetooth speaker. The relevant modules are all readily available ...